Does the 28LJ4540 work with RemotApp?
If this unit is a Smart TV, RemotApp controls it over Wi-Fi (webOS 3.5). Basic versions without Wi-Fi can be controlled by infrared from Android phones with an IR blaster.
- Remote over Wi-Fi Yes
- Infrared (Android with IR) Yes
- Send photos and videos Yes
- Turn on from the phone Yes
Protocol: LG webOS (SSAP 3000/3001)
What the code 28LJ4540 means
TV model codes follow the maker’s naming rules. Reading it piece by piece:
28Screen size in inchesLJ4540Series (2017 line) · LED
28LJ4540 specifications
Display
| Display diagonal | 69.8 cm (27.5") |
|---|---|
| Display resolution | 1366 x 768 pixels |
| HD type | WXGA |
| Native aspect ratio | 16:9 |
| Display technology | LED |
| Panel type | ADS |
| Touchscreen | No |
| Display brightness (typical) | 200 cd/m² |
| Response time | 8 ms |
| Screen shape | Flat |
| Supported graphics resolutions | 1366 x 768 |
| Aspect ratio | 4:3, 16:9 |
| Contrast ratio (typical) | 1000:1 |
| Contrast ratio (dynamic) | 5000000:1 |
| Viewing angle, horizontal | 178° |
| Viewing angle, vertical | 178° |
| Display number of colours | 16.78 million colours |
| Pixel pitch | 0.44475 x 0.44925 mm |
| Colour gamut | 68% |
| 3D | No |
Multimedia
| Number of speakers | 2 |
|---|---|
| RMS rated power | 10 W |
| Built-in speaker(s) | Yes |
| Built-in camera | No |
Design
| Product colour | Black |
|---|
Ports & interfaces
| USB Type-A downstream ports quantity | 1 |
|---|---|
| DVI port | No |
| HDMI ports quantity | 1 |
| HDCP | Yes |
Ergonomics
| VESA mounting | Yes |
|---|---|
| Panel mounting interface | 100 x 100 mm |
| Cable lock slot | No |
| Height adjustment | No |
Power
| Power consumption (typical) | 28 W |
|---|---|
| Power consumption (off) | 0.5 W |
| Power consumption (PowerSave) | 1 W |
| AC input voltage | 100 - 240 V |
Weight & dimensions
| Width (with stand) | 642.6 mm |
|---|---|
| Depth (with stand) | 185.4 mm |
| Height (with stand) | 434.3 mm |
| Weight (with stand) | 4.72 kg |
| Width (without stand) | 642.6 mm |
| Depth (without stand) | 58.4 mm |
| Height (without stand) | 396.2 mm |
| Weight (without stand) | 4.49 kg |
Other features
| On/off switch | Yes |
|---|---|
| Analog signal format system | NTSC |
| Digital signal format system | ATSC |
| Picture mode | Vivid/ Standard/ APS/ Cinema/Sport/Game/Expert1/ Expert2 |
| Sleep timer | Yes |
| No flickering | Yes |
| On/Off timer | Yes |
| Supplied AC adapter type | LED |
Thin Client
| Thin client installed | No |
|---|
Technical data: Open Icecat and the manufacturer. Check the official page before buying; specs can vary by batch and market.
How to control the 28LJ4540 with your phone
- Connect your phone to the same Wi-Fi network as the TV. (Not the guest network.)
- Turn the TV on and install RemotApp on your phone.
- Open RemotApp. It finds the TVs on your network by itself; tap your LG TV.
- The TV shows a connection request from RemotApp. Select “Accept”.
- Tap Volume + to test. That’s it: your phone is now the remote.
Full guide for LG TVs, with fixes when it won’t connect
Turning the 28LJ4540 on without the remote
Turn on “Mobile TV On” (or “Turn on via Wi-Fi”), usually under Settings › General › Devices. The TV then accepts a wake-up signal from your phone while in standby.
Questions about the 28LJ4540
Can I control the LG 28LJ4540 with my phone?
If this unit is a Smart TV, RemotApp controls it over Wi-Fi (webOS 3.5). Basic versions without Wi-Fi can be controlled by infrared from Android phones with an IR blaster.
What year is the LG 28LJ4540?
The 28LJ4540 is part of LG’s 2017 line (LED LJ4540).
What operating system does the 28LJ4540 use?
The 28LJ4540 runs webOS 3.5.
How many HDMI ports does the 28LJ4540 have?
The 28LJ4540 has 1 HDMI ports.
Turning the 28LJ4540 on without the remote
Turn on “Mobile TV On” (or “Turn on via Wi-Fi”), usually under Settings › General › Devices. The TV then accepts a wake-up signal from your phone while in standby.